Since his arrival at Les Petits Chanteurs du Mont-Royalhe has been involved in collaborations with the Montreal Symphony Orchestra, the Montreal Bach Festival, Les Grands Ballets Canadien, Opera Montreal, the Schulich School of Music at McGill University, Montreal #375, PODIUM 2018, and the Metropolitan Orchestra, to mention but a few.

He has worked as guest chorus master with multiple choirs, including Chœur classique Vaudreuil-Soulanges, Chœurs du Nouveau Monde and Cirque du Soleil. He has prepared choirs for conductors and composers, including Kent Nagano, Zubin Mehta, Karl Jenkins, Joby Talbot, Stephen Layton, Gregory Charles, Iwan Edwards, Jordan de Souza, Jean-Pascal Hamelin, Robert Ingari, Alain Trudel and Stéphane Laforest and has directed vocal ensembles for popular artists Cœur de Pirate, Les Trois Accords, The Beach Boys, Nikki Yanofsky, Marie-Mae, Malajube, Radio Radio, Sarah McLachlan, Kenny Rogers, Roger Water (‘The Wall’) and The Canadian Tenors. In 2011 Andrew conducted both the opening and closing choral/orchestral concerts of the Mondial Choral Festival in Laval.

Through his work with the Montreal Choral Institute and its flagship choral ensemble Voces Boreales, Andrew explores diverse and exciting contemporary choral repertoire, in particular the work of Canadian, Scandinavian and Baltic composers, as well as presenting conducting and choral workshops each season. Recent world premieres include works from Tim Brady, Lucas Florczak, Stephanie Moore, Dominique Lafortune, Ben Duinker and Jason Noble. In summer 2018 he will direct Voces Boreales at the Lanaudière Festival for a special performance of Joby Talbot’s extraordinary choral masterpiece Path of Miracles.